Author Topic: fridge compressor to air compressor wiring problems  (Read 2452 times)

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Offline floobydust

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Re: fridge compressor to air compressor wiring problems
« Reply #25 on: April 16, 2019, 08:33:46 pm »
Move the brown wire over like this
 

Offline capoman

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Re: fridge compressor to air compressor wiring problems
« Reply #26 on: April 17, 2019, 02:47:29 pm »
i already did but it did just a spark 
in that case so the terminal A will be connected to the phase
and as we see the terminal B connected to the neutr 
what about the terminal C ?
 

Offline capoman

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Re: fridge compressor to air compressor wiring problems
« Reply #27 on: April 17, 2019, 04:23:33 pm »
well iv tried your soulution it worked but it turn off after 30/40 second
and iv tried to turn it on with direct cable
witout relay .........
but it have a low pressure u cant feel no air out
 

Online Ian.M

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Re: fridge compressor to air compressor wiring problems
« Reply #28 on: April 17, 2019, 07:46:07 pm »
Sounds like its FUBARed.   Once started, a split-phase hermetic compressor should be able to run for hours unloaded (both intake and discharge pipes open to the atmosphere) without any signs of distress and produce more than 100 PSI operating into a reservoir with a pressure relief valve.  It wont however start if there is a  high back-pressure  at the outlet.

 

Offline capoman

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Re: fridge compressor to air compressor wiring problems
« Reply #29 on: April 17, 2019, 08:37:02 pm »
its a 1/5 hp i dont know that type of compresser if it produce air pressure or not ..... or its faulty



i hooked ot up like that it start runing silently but no air

 

Online james_s

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Re: fridge compressor to air compressor wiring problems
« Reply #30 on: April 17, 2019, 09:09:41 pm »
Did it start or just hum? If the latter then it sounds like it's seized. Are you sure you have power going to the main winding and not the start winding? The start winding should only be energized momentarily.
 

Offline capoman

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Re: fridge compressor to air compressor wiring problems
« Reply #31 on: April 18, 2019, 06:45:24 pm »
well i put the L to the comun
N to the Runing
and i did a push button between the R & S

guy is it realy dangerous if i mess with wirimg
my explod  ?
 

Offline PaulAm

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Re: fridge compressor to air compressor wiring problems
« Reply #32 on: April 18, 2019, 08:12:37 pm »
These compressors really don't have a lot of start up torque.  When they start up inlet and outlet pressures are the same so there's no initial load.  It's possible the bearings have gummed up in which case it's toast.

I had a new compressor die after an hour so I opened it up.  That one had a faulty oil path so the bearings had gummed up.  It's amazing how little is in there.
 

Offline floobydust

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Re: fridge compressor to air compressor wiring problems
« Reply #33 on: April 18, 2019, 08:33:50 pm »
capoman, what was wrong with using the factory terminal block?
It has the thermal overload Klixon and PTC for starting. Make sure the compressor has a ground wire. If the motor is burnt it will short-circuit Line to case and you will get electrocuted. Be safe.

When it ran for 30-40 seconds, either the Klixon tripped from overheating or the motor has no oil and seized. The datasheet says mineral oil 210cc.
 

Offline amyk

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Re: fridge compressor to air compressor wiring problems
« Reply #34 on: April 19, 2019, 02:13:17 am »
It'll be very, very obvious if it's actually running, because it'll be sucking and blowing...

here's a good video to watch about how to connect these:
 

Offline capoman

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Re: fridge compressor to air compressor wiring problems
« Reply #35 on: April 19, 2019, 05:25:53 pm »
 |Owell if i use the ptc / klixon
the compressor start for a while 20s / 30 s then shut off
 

Online james_s

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Re: fridge compressor to air compressor wiring problems
« Reply #36 on: April 19, 2019, 06:29:10 pm »
That's a great idea hitting a seized compressor with 240V momentarily to free it up. I had a rotary compressor I was using as a vacuum pump that seized up after sitting and I ended up chucking it up in a lathe, spinning the whole compressor up to speed and then stomping on the brake treadle. It did work, but was only feasible with the rotary compressor which was both round and had the internals rigidly mounted. Reciprocating refrigeration compressors sit on springs inside the dome.
 


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